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CLAudit: Planetary-Scale Cloud Latency Auditing Platform
Ondrej Tomanek ([email protected])Lukas Kencl ([email protected])
Czech Technical University in Prague
Tomanek, Kencl: CLAudit - Planetary-Scale Cloud Latency Auditing Platform
Agenda
• Background• Motivation• CLAudit• Measurements• Anomaly showcase• Conclusion
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Cloud service• Cloud computing, Cloud service, Cloud application
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Cloud service latency• Latency: sum of delays, semi-bounded, variable• Service latency: made out of many sub-latencies
Tomanek, Kencl: CLAudit - Planetary-Scale Cloud Latency Auditing Platform
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MotivationCloud service latency lacks a model
Performance troubleshooting is nontrivialEmerging apps, Suboptimal practices, Overlay services
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TOOLWhat we need is a ...
CLAudit - deployment
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Clients (Planetlab) AppServers (Azure) DBservers (Azure) Monitor (CTU)
CLAudit - components
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DATA CENTER
Measurements
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Measurements - notes• Measured variables• Preprocessing • Setup:– 3 minutes period– 5 probes of each type sent– median (and min) recorded– millisec precision– lost sample = 0 millisec
1 month = ~400 MB datasetTomanek, Kencl: CLAudit - Planetary-Scale Cloud Latency Auditing Platform 9
Measurements - example
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Chicago
Anomaly showcase
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Anomaly showcase – ‘HTTP spike’
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Chicago
Anomaly showcase – ‘Periodic behavior’
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Hong Kong Dublin
The paper contains:- more examples- more anomalies- event analyses
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Future directions• Latency model• Representativeness – mobility, multiple VMs• SDN & Realtime processing
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Conclusion• Novel planetary-scale distributed approach to
latency monitoring:– Allows for data interpretation and event reasoning– Helps Cloud users– Helps Cloud tenants– Helps Cloud providers
Thank you for attention
Tomanek, Kencl: CLAudit - Planetary-Scale Cloud Latency Auditing Platform – published at IEEE Cloudnet 2013, San Francisco, USA
• The data are available for use (open license) http://www.rdc.cz/en/projects/CloudComputing/CLAudit
• We’re looking for partners and collaborators
[email protected] [email protected]
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